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Method for improving magnet measuring precision of three elements

A three-element, magnetic surveying technology, which is used in electrical/magnetic detection, geophysical measurement, and instrumentation for logging records, can solve problems such as low accuracy, and achieve the effect of expanding the scope of ore prospecting.

Inactive Publication Date: 2010-06-23
SINOTECH MINERALS EXPLORATION
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Problems solved by technology

[0005] The existing three-component magnetic measurement systems produced or developed at home and abroad generally have a magnetic measurement accuracy in the range of 200-400nT, and the accuracy is low, so they are only suitable for searching for magnetite minerals with strong magnetic properties.

Method used

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  • Method for improving magnet measuring precision of three elements
  • Method for improving magnet measuring precision of three elements
  • Method for improving magnet measuring precision of three elements

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Embodiment Construction

[0054] The implementation steps of the method of the present invention are further described by taking the following specific manner as an example.

[0055]The applicant believes that the accuracy of the three-component magnetic measurement system in the well depends on the magnetic measurement accuracy of the system and the conversion accuracy from the axial system to the vertical system. The magnetic measurement accuracy is determined by the accuracy of the gravity, magnetic sensors and electronic circuits. The accuracy is determined by the three-axis right-angle deviation of the two axial coordinate systems composed of six gravity and magnetic sensors and the coincidence deviation of the gravity and magnetic coordinates. Due to the narrow space of the downhole probe, it is difficult to rely on mechanical adjustment Therefore, the coordinate conversion error is far greater than the system observation error. The main reason for the low accuracy of the three-component magnetic ...

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Abstract

The invention relates to the field of physical geography magnetic method explosion, which is used for analyzing and calibrating a three-component magnetometer produced by factories and substantially improving the measured actual value after being corrected. By the method, a plurality of data in a uniform magnetic field are measured first and need to meet the requirement for calculating the deviations of installation angles of various elements at high precision. After calculating various deviation angles, a gravity magnetic component value measured in the actual detection is directly corrected into a measuring result with high precision on a computer by using the deviation angle with high precision. The method improves the magnetic measuring precision and ensures that the magnetic measuring precision of the three-component magnetometer is improved to 10-30nT.

Description

technical field [0001] The invention relates to the field of geophysical magnetic exploration, in particular to a method for improving the measurement accuracy of a three-component magnetic survey system. Background technique [0002] For a moving object, in the Cartesian coordinate system of its moving direction (axial), three gravity (acceleration) and three magnetic field sensors are installed along the three axes. The three-component magnetic field value of the coordinate system is converted into the three-component magnetic field value of the vertical coordinate system, that is, two horizontal components Hx, Hy and one vertical component Hz of the geomagnetic field are obtained. Therefore, the change of the spatial magnetic azimuth and inclination angle of the moving object with the above six elements can be detected by the deviation of the horizontal and vertical components of the geomagnetic field from the normal value to find the local anomaly of the geomagnetic fiel...

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Application Information

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IPC IPC(8): G01V3/26G01V13/00
Inventor 王庆乙李学圣
Owner SINOTECH MINERALS EXPLORATION
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